Free Stuff

Free Stuff We Use

For the lawyers, we should point out that the things here do have licenses, and so aren't entirely free. We just mean the licenses are relatively unrestrictive, and you don't need to give away your hard-earned cash.

In our products, we use:

Software

• The Rapture3D Ambisonic Player uses libsndfile which is written by Erik de Castro Lopo and licensed under the LGPL. It's a really useful C library for reading and writing soundfiles. It's available from http://www.mega-nerd.com/libsndfile/.
• Most of the Blue Ripple Sound graphical user interface components in our stand-alone applications have been written using wxWidgets. This is a cross-platform C++ GUI toolkit which is written by Julian Smart and others and is licensed under a variant of the LGPL. It is available from http://wxwidgets.org.
• The macOS version of Rapture3D uses the PortAudio Portable Real-Time Audio Library, which is Copyright 1999-2008 Ross Bencina, Phil Burk and others. See http://www.portaudio.com.
• Our studio plugins use libpng, by Guy Eric Schalnat, Andreas Dilger, John Bowler, Glenn Randers-Pehrson, and others. See http://www.libpng.org.
• libBSR (part of Rapture3D for Unity) uses libogg and libvorbis, by Chris Montgomery and others. See http://www.xiph.org.
• To extract data from AES69 or SOFA files, Rapture3D Advanced uses NetCDF (Copyright 1993-2014 University Corporation of Atmospheric Research/Unidata) and HDF5 (Copyright 1998-2006 The Board of Trustees of the University of Illinois and Copyright 2006-2014 The HDF Group). See http://www.unidata.ucar.edu/software/netcdf/ and https://www.hdfgroup.org/HDF5/.

Data

We use the following HRTF data. Note that we process the data quite heavily, so don't blame the folk below if things don't work for you!

• The MIT KEMAR data set by Bill Gardner and Keith Martin, available at http://sound.media.mit.edu/resources/KEMAR.html.
• The IRCAM LISTEN HRTF data set, available at http://recherche.ircam.fr/equipes/salles/listen/index.html.
• The CIAIR HRTF data set by Takanori Nishino, Shoji Kajita, Kazuya Takeda and Fumitada Itakura, available at http://www.sp.m.is.nagoya-u.ac.jp/HRTF/database.html.
• The SADIE II data set, prepared at the University of York. This is available at https://www.york.ac.uk/sadie-project/index.html.

This website also uses GeoLite2 data created by MaxMind, available from https://www.maxmind.com.

Artwork

• We've also used some free icons from Yusuke Kamiyamane which can be found at http://y.yusukekamiyamane.com.

Free Stuff From Us

UHJ Stereo to Ambisonic B-Format Conversion

We provide a simple Windows UHJ stereo to Ambisonic B-Format conversion tool for Windows. It converts stereo material that is in the UHJ format (typically from Nimbus Records) into Ambisonic B-Format .AMB files (using FuMa encoding and just the WXY channels). It uses the "naive" speaker-agnostic approach to this.

O3A Core Plugins

The entire O3A Core plugin library can be downloaded free of charge.